Well, I recall building up a 2010 TCR Advanced in medium and a friend doing an M/L (same colour etc) and the difference in frame weight was c.90g ... so you should be looking at c.1kg for an ML is my guess.

Looks like a fun bike to me...Sure you can swap some parts for lighter... really depends on what you are looking for. If you handed me the bike you just proposed, I'd probably say, "thanks" and wouldn't come back for 6 hours and would be very happy about it.But if you want to lighten it up, I'd investigate the cost/weight/fun ratio of upgrading to a lighter crankset (I'm a big fan of the low Q factor Zipp VumaQuad but that's just me) and a 236g cassette can be reduced obviously... but the performance will be the same or less... at a higher price tag, so choose carefully.

Bottle cages can be reduced to almost nothing with minimal carbon models such as Tune. I've used the Tune versions for 3 years and only lost 1 bottle during that time.... on a road so bumpy and jarring that I was sure I lost 3 teeth... I have another bike with the Specialized cages you mentioned and they are very nice, hold the bottle better, and look nicer with a white (or non-black, colored) frame (since they come with a few color choices).

Zipp wheels are great. You should use them. Unless you want something lighter. Then seek out alternatives and save 100-450 grams. The Reynolds DV46C UL is my favorite lightweight clincher, but they are almost impossible to find now.

You could save 100g with Speedplay pedals. I'm sure you know that. If you like the Keo's, stand proud and rock 'em. No shame there.

Looks like a good smart build. Might not win any WW contests, but will provide plenty of grins with money saved for the next upgrade or build project.

For the record, I don't think there are "too many heavy parts" as previously observed.

You could go with many other bar/stem combos that are lighter unless you want the integrated set-up. KMC SL chains are lighter than Shimano and work as well or better. Many other lighter brakes out there that dont give up braking power or modulation.

IMHO, Ditch the Zipp Wheels. They are heavy and overpriced! I had a set and was very unimpressed. This is only my opinion but I think the older style Zipp Wheels look dated. You can build a fairly inexpensive set of wheels based on a set of Stans NoTubes, Tune Hubs, Sapim spokes and save about a pound. Especially, know that you see the Firecrest Wheels on the street.

thought long and hard about the wheels but im glad i went for them, ive tried nearly everything else and theyre the best ive ridden, wouldnt want to change them, the firecrest are good but the braking just isnt good enough for what i want

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